Navien NPE-240A Installation Manual page 40

Figure 5. Exploded view of Gas assembly
DANGER
See Figure 5. Inspect the O-ring between the gas valve and
gas valve inlet adapter whenever they are disassembled. The
O-ring must be in good condition and must be installed. Failure
to comply will cause a gas leak, resulting in severe personal
injury or death.
240LP
Figure 6. Orifice identification
40 Appendixes
Gas Orifice
O-ring
240NG
7. Replace the old Orifice piece with the new part for use with LP
gas. Ensure that the Orifice is properly seated inside the port
before proceeding to the next step.
8. Replace the gas inlet pipe to its original position and use all
screws to secure all connections.
Do not overtighten as this may damage or crack
Note
the components.
DANGER
Inspect the O-ring between the gas valve and gas valve inlet
adapter whenever they are disassembled. The O-ring must be
in good condition and must be installed. Failure to comply will
cause a gas leak, resulting in severe personal injury or death.
9. Set the Front Panel Dip switch according to the gas type.
WARNING
Be sure to turn off the power before changing the DIP switch
setting.
DANGER
When conversion is required, be sure to set the Front Panel
●
DIP switches according to the supply gas type.
Failure to properly set the DIP switches could cause carbon
●
monoxide poisoning, resulting in severe personal injury or
death.
10. Turn on the gas and water supply to the water heater.
ON ON
1 2 3 4 5 6 7 8 9 10 1 2
NG LP
1 2 1 2